Updating a Database Using a DataSet With EntLib 2.0

public partial class StateDisclaimer : UserControl
{
   private Database db;
   private DataSet ds;
   private DbCommand cmd;
   private string strConfigParameters;
   
   public StateDisclaimer()
   {
      InitializeComponent();
   }
   
   private void StateDisclaimer_Load(object sender, EventArgs e)
   {
      LoadDataGrid();
   }
   
   private void LoadDataGrid()
   {
      try
      {
         // Create the Database
         db = DatabaseFactory.CreateDatabase("dbConnection");
         // Retrieve the initial DataSet
         ds = new DataSet();
         cmd = db.GetStoredProcCommand("sp_getMiniMirandaInfo");
         strConfigParameters = "ConfigParameters";
         db.LoadDataSet(cmd, ds, strConfigParameters);
         dataGridView1.DataSource = ds.Tables[0];
         dataGridView1.Columns[0].Visible = false;
         dataGridView1.Columns[1].ReadOnly = true;
         dataGridView1.Sort(dataGridView1.Columns[1], ListSortDirection.Ascending);
         dataGridView1.AutoResizeColumns();
      }
      catch (DbException ex)
      {
         MessageBox.Show(ex.ToString());
      }
   }
      
   private void btnApply_Click(object sender, EventArgs e)
   {
      if (ds.HasChanges())
      {
         DbCommand updateCommand = db.GetStoredProcCommand("sp_UpdateConfigParametersDataValue");
         db.AddInParameter(updateCommand, "Category", DbType.String, "Category", DataRowVersion.Current);
         db.AddInParameter(updateCommand, "KeyValue", DbType.String, "KeyValue", DataRowVersion.Current);
         db.AddInParameter(updateCommand, "DataValue", DbType.String, "DataValue", DataRowVersion.Current);
         int rowsAffected = db.UpdateDataSet(ds, "ConfigParameters", null, updateCommand, null, UpdateBehavior.Standard);
         MessageBox.Show(rowsAffected.ToString());
      }
   }

   private void btnCancel_Click(object sender, EventArgs e)
   {
      if (ds.HasChanges())
      {
         try
         {
            ds.RejectChanges();
            dataGridView1.Refresh();
         }
         catch (DbException ex)
         {
            MessageBox.Show(ex.ToString());
         }
      }
   }
}